CN112082840A - Method for establishing concrete crack resistance curve - Google Patents
Method for establishing concrete crack resistance curve Download PDFInfo
- Publication number
- CN112082840A CN112082840A CN202011180495.2A CN202011180495A CN112082840A CN 112082840 A CN112082840 A CN 112082840A CN 202011180495 A CN202011180495 A CN 202011180495A CN 112082840 A CN112082840 A CN 112082840A
- Authority
- CN
- China
- Prior art keywords
- concrete
- crack resistance
- standard
- crack
- establishing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000005336 cracking Methods 0.000 claims abstract description 58
- 238000012360 testing method Methods 0.000 claims abstract description 58
- 238000004519 manufacturing process Methods 0.000 claims abstract description 12
- 230000001678 irradiating effect Effects 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 3
- 238000011056 performance test Methods 0.000 abstract description 4
- 238000007605 air drying Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/38—Concrete; Lime; Mortar; Gypsum; Bricks; Ceramics; Glass
- G01N33/383—Concrete or cement
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- Pathology (AREA)
- Immunology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Biochemistry (AREA)
- General Physics & Mathematics (AREA)
- Ceramic Engineering (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a method for establishing a concrete anti-cracking performance curve, which comprises the steps of setting a plurality of different concrete anti-cracking performance grades, respectively manufacturing a plurality of standard concrete test pieces aiming at each concrete anti-cracking performance grade, carrying out a concrete anti-cracking performance test on the standard concrete test pieces, respectively recording crack data of each standard concrete test piece, respectively calculating the average value of the crack data of the plurality of standard concrete test pieces corresponding to each concrete anti-cracking performance grade according to the crack data, and fitting according to each concrete anti-cracking performance grade and the average value of the corresponding crack data to obtain the concrete anti-cracking performance curve.
Description
Technical Field
The invention relates to the technical field of concrete detection, in particular to a method for establishing a concrete anti-cracking performance curve.
Background
Concrete cracks are physical structural changes due to the action of internal and external factors of a concrete structure, and include plastic shrinkage cracks, settlement shrinkage cracks, temperature cracks and the like. Concrete cracks are a main cause of reduction in the bearing capacity, durability and waterproofness of concrete structures, and therefore, it is of great significance to study the crack resistance of concrete.
In the prior art, the cracking resistance of concrete is generally tested, and then the cracking resistance of concrete is correspondingly classified into a plurality of grades according to the width of a crack. However, the classification method is too general, the distinction degree of the crack resistance is not obvious, and the crack resistance of the concrete cannot be well reflected.
Disclosure of Invention
In order to solve the technical problems, the invention provides a method for establishing a concrete anti-cracking performance curve, which can establish a fitting curve of the concrete anti-cracking performance and crack data so as to accurately evaluate the concrete anti-cracking performance.
The invention provides a method for establishing a concrete crack resistance curve, which comprises the following steps:
setting a plurality of different concrete crack resistance grades;
respectively manufacturing a plurality of standard concrete samples according to each concrete crack resistance grade;
performing a concrete crack resistance test on the standard concrete test pieces, and respectively recording crack data of each standard concrete test piece;
respectively calculating the average value of the crack data of a plurality of standard concrete samples corresponding to each concrete crack resistance grade according to the crack data;
and fitting to obtain a concrete anti-cracking performance curve according to the concrete anti-cracking performance grades and the average value of the corresponding crack data.
Preferably, the manufacturing of the plurality of standard concrete samples respectively aiming at each concrete crack resistance grade comprises:
respectively designing a plurality of concrete mixing ratios according to each concrete anti-cracking performance grade;
and respectively manufacturing a plurality of standard concrete samples according to the concrete mixing proportion.
Preferably, after a plurality of standard concrete test pieces are respectively manufactured for each concrete crack resistance grade, the method further comprises:
and respectively implanting labels into the manufactured standard concrete test pieces.
Preferably, after the standard concrete test pieces are respectively implanted with the labels, the method further comprises the following steps:
and placing the standard concrete test piece implanted with the label in a standard curing room for curing.
Preferably, the concrete crack resistance test performed on the standard concrete sample specifically comprises:
and carrying out a concrete crack resistance test on the standard concrete sample by adopting a flat plate crack resistance method.
Preferably, the flat plate crack resistance method specifically comprises the following steps:
and blowing air in a direction parallel to the surface of the standard concrete test piece, irradiating the air above the standard concrete test piece through a light source, and observing cracks on the surface of the standard concrete test piece after a certain time.
Preferably, the crack data comprises: the number of cracks, the length and width of each crack.
Preferably, the calculating, according to the crack data, an average value of the crack data of the plurality of standard concrete samples corresponding to each concrete crack resistance rating is respectively, specifically:
and calculating the total crack area according to the number of the cracks and the length and width of each crack, and then respectively calculating the average value of the total crack areas of the plurality of standard concrete samples corresponding to each concrete crack resistance grade.
The method for establishing the concrete anti-cracking performance curve provided by the embodiment of the invention comprises the steps of respectively manufacturing a plurality of standard concrete test pieces aiming at each concrete anti-cracking performance grade by setting a plurality of different concrete anti-cracking performance grades, carrying out concrete anti-cracking performance tests on the standard concrete test pieces, respectively recording crack data of each standard concrete test piece, respectively calculating the average value of the crack data of the plurality of standard concrete test pieces corresponding to each concrete anti-cracking performance grade according to the crack data, fitting according to each concrete anti-cracking performance grade and the average value of the corresponding crack data to obtain the concrete anti-cracking performance curve, namely, when the anti-cracking performance of the concrete is evaluated, only the crack data of the concrete is required to be substituted into the concrete anti-cracking performance curve to obtain an accurate concrete anti-cracking performance index value, compared with the prior art, the method can establish a fitting curve of the concrete anti-cracking performance and crack data, so that the concrete anti-cracking performance is accurately evaluated.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic flow chart of a method for establishing a concrete crack resistance curve according to an embodiment of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or be indirectly disposed on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, the meaning of a plurality of or a plurality of is two or more unless specifically limited otherwise.
It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for understanding and reading the contents disclosed in the specification, and are not used for limiting the conditions that the present application can implement, so the present invention has no technical significance, and any structural modification, ratio relationship change or size adjustment should still fall within the scope of the technical content disclosed in the present application without affecting the efficacy and the achievable purpose of the present application.
The embodiment of the present invention provides a method for establishing a concrete crack resistance curve, please refer to fig. 1, the method includes:
and S110, setting a plurality of different concrete crack resistance grades.
In the embodiment of the invention, a plurality of different concrete crack resistance grades are set according to practical application conditions. The more the number of the grades of the set concrete cracking resistance is, the more accurate the concrete cracking resistance curve obtained by fitting is, and therefore the higher the accuracy of evaluating the cracking resistance of the concrete is.
And S120, respectively manufacturing a plurality of standard concrete samples according to each concrete crack resistance grade.
In the embodiment of the invention, a plurality of standard concrete samples are manufactured according to each concrete crack resistance grade. The standard concrete test piece refers to the concrete test piece with standard size. It can be understood that the more the number of the standard concrete samples manufactured in the same anti-cracking performance grade is, the smaller the error of the crack data obtained by the test is, and the more accurate the concrete anti-cracking performance curve obtained by fitting is, so that the accuracy of evaluating the anti-cracking performance of the concrete is higher.
S130, performing a concrete crack resistance test on the standard concrete test pieces, and respectively recording crack data of each standard concrete test piece.
In the embodiment of the invention, after the standard concrete test piece is manufactured, the concrete anti-cracking performance test is carried out, and the crack data of each standard concrete test piece is respectively recorded.
And S140, respectively calculating the average value of the crack data of the plurality of standard concrete samples corresponding to each concrete crack resistance grade according to the crack data.
In the embodiment of the invention, the average value of the crack data of the plurality of standard concrete samples corresponding to each concrete crack resistance grade can be respectively calculated according to the recorded crack data of each standard concrete sample.
And S150, fitting according to the concrete crack resistance grades and the average value of the corresponding crack data to obtain a concrete crack resistance curve.
In the embodiment of the invention, the concrete anti-cracking performance curve can be obtained by fitting according to the corresponding relation between each concrete anti-cracking performance grade and the average value of the crack data obtained by testing. That is, when the crack resistance of the concrete needs to be evaluated, the crack resistance index value of the concrete can be obtained by only substituting the crack data of the concrete into the crack resistance curve of the concrete.
As can be seen from the above, the method for establishing a concrete anti-cracking performance curve provided in the embodiment of the present invention includes setting a plurality of different concrete anti-cracking performance grades, respectively manufacturing a plurality of standard concrete test pieces for each concrete anti-cracking performance grade, performing a concrete anti-cracking performance test on the standard concrete test pieces, respectively recording crack data of each standard concrete test piece, respectively calculating an average value of the crack data of the plurality of standard concrete test pieces corresponding to each concrete anti-cracking performance grade according to the crack data, fitting the average value of the crack data of each concrete anti-cracking performance grade and the corresponding crack data to obtain a concrete anti-cracking performance curve, that is, when evaluating the anti-cracking performance of the concrete, only substituting the crack data of the concrete into the concrete anti-cracking performance curve to obtain an accurate index value of the anti-cracking performance of the concrete, compared with the prior art, the method can establish a fitting curve of the concrete anti-cracking performance and crack data, so that the concrete anti-cracking performance is accurately evaluated.
Specifically, in the foregoing embodiment, step S120 includes:
respectively designing a plurality of concrete mixing ratios according to each concrete anti-cracking performance grade;
and respectively manufacturing a plurality of standard concrete samples according to the concrete mixing proportion.
In the embodiment of the invention, according to practical experience, a plurality of concrete mixing ratios are respectively designed for each concrete anti-cracking performance grade, then a standard concrete sample is respectively manufactured for each concrete mixing ratio, and a plurality of standard concrete samples corresponding to each concrete anti-cracking performance grade are obtained. Each concrete mixing proportion can be used for manufacturing only one standard concrete sample or a plurality of standard concrete samples, and the skilled person can select the standard concrete samples according to actual needs without specific limitations.
Further, in the above embodiment, in step S120, the method further includes:
and respectively implanting labels into the manufactured standard concrete test pieces.
In the embodiment of the invention, in order to avoid disorder of the corresponding relation between the standard concrete test piece and the concrete anti-cracking performance grade, labels are respectively implanted into the manufactured standard concrete test pieces. The label can contain identification information corresponding to the concrete crack resistance grade.
Further, in the above embodiment, after the labels are respectively implanted into the manufactured standard concrete test pieces, the method further includes:
and placing the standard concrete test piece implanted with the label in a standard curing room for curing.
In the embodiment of the invention, a standard curing room adopts natural conditions simulating a construction site, the curing temperature is close to 20 ℃, each standard concrete test piece is covered with a straw bag for watering and curing, the bottom surface is downward, the top surface is upward, and the side surface can be fully contacted with air.
Specifically, in the above embodiment, in step S130, the concrete crack resistance test is performed on the standard concrete sample, specifically:
and (3) carrying out a concrete crack resistance test on the standard concrete sample by adopting a flat plate crack resistance method.
Further, in the above embodiments, the flat plate crack resistance method specifically includes:
blowing air in a direction parallel to the surface of the standard concrete test piece, irradiating the standard concrete test piece by a light source, and observing cracks on the surface of the standard concrete test piece after a certain time.
In the embodiment of the invention, the concrete crack resistance test can be carried out on the standard concrete sample by a flat plate crack resistance method or a circular ring crack resistance method. The embodiment adopts a flat plate anti-cracking method, and particularly, the fan blows air parallel to the surface of a standard concrete test piece at a constant air speed to accelerate air drying. The method comprises the steps of counting from the time of mixing and water adding of a standard concrete sample, irradiating the standard concrete sample by a tungsten lamp after four hours, simulating sunshine conditions, and simulating a cracking environment under natural air drying and temperature difference by various means. And observing the crack distribution on the surface of the standard concrete test piece after the water adding time is twenty-four hours, wherein the crack time of the crack is the time for continuously observing until the crack begins to appear.
Further, in the above embodiment, the crack data includes: the number of cracks, the length and width of each crack.
Further, in the above embodiment, step S140 specifically includes:
and calculating the total crack area according to the number of the cracks, the length and the width of each crack, and then respectively calculating the average value of the total crack area of a plurality of standard concrete samples corresponding to each concrete crack resistance grade.
In the embodiment of the invention, the total crack area can be calculated according to the number of cracks and the length and width of each crack, and then the average value of the total crack area is calculated. When the average value is calculated, the maximum value and the minimum value of the total crack area can be removed, and the rest average value is taken, so that the obtained crack data is more accurate.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A method for establishing a concrete crack resistance curve is characterized by comprising the following steps:
setting a plurality of different concrete crack resistance grades;
respectively manufacturing a plurality of standard concrete samples according to each concrete crack resistance grade;
performing a concrete crack resistance test on the standard concrete test pieces, and respectively recording crack data of each standard concrete test piece;
respectively calculating the average value of the crack data of a plurality of standard concrete samples corresponding to each concrete crack resistance grade according to the crack data;
and fitting to obtain a concrete anti-cracking performance curve according to the concrete anti-cracking performance grades and the average value of the corresponding crack data.
2. The method for establishing the concrete crack resistance curve according to claim 1, wherein the step of respectively manufacturing a plurality of standard concrete test pieces according to each concrete crack resistance grade comprises the following steps:
respectively designing a plurality of concrete mixing ratios according to each concrete anti-cracking performance grade;
and respectively manufacturing a plurality of standard concrete samples according to the concrete mixing proportion.
3. The method for establishing the concrete crack resistance curve according to claim 1, wherein after the plurality of standard concrete samples are respectively manufactured for each concrete crack resistance grade, the method further comprises the following steps:
and respectively implanting labels into the manufactured standard concrete test pieces.
4. The method for establishing the concrete crack resistance curve according to claim 3, wherein after the labels are respectively implanted into the prepared standard concrete samples, the method further comprises the following steps:
and placing the standard concrete test piece implanted with the label in a standard curing room for curing.
5. The method for establishing the concrete crack resistance curve according to claim 1, wherein the concrete crack resistance test is performed on the standard concrete sample, and specifically comprises the following steps:
and carrying out a concrete crack resistance test on the standard concrete sample by adopting a flat plate crack resistance method.
6. The method for establishing the concrete crack resistance curve according to claim 5, wherein the slab crack resistance method specifically comprises the following steps:
and blowing air in a direction parallel to the surface of the standard concrete test piece, irradiating the air above the standard concrete test piece through a light source, and observing cracks on the surface of the standard concrete test piece after a certain time.
7. The method for establishing a concrete crack resistance curve according to claim 1, wherein the crack data comprises: the number of cracks, the length and width of each crack.
8. The method for establishing the concrete crack resistance curve according to claim 7, wherein the step of calculating the average value of the crack data of the plurality of standard concrete samples corresponding to each concrete crack resistance grade according to the crack data comprises the following specific steps:
and calculating the total crack area according to the number of the cracks and the length and width of each crack, and then respectively calculating the average value of the total crack areas of the plurality of standard concrete samples corresponding to each concrete crack resistance grade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011180495.2A CN112082840A (en) | 2020-10-29 | 2020-10-29 | Method for establishing concrete crack resistance curve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011180495.2A CN112082840A (en) | 2020-10-29 | 2020-10-29 | Method for establishing concrete crack resistance curve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112082840A true CN112082840A (en) | 2020-12-15 |
Family
ID=73730731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011180495.2A Pending CN112082840A (en) | 2020-10-29 | 2020-10-29 | Method for establishing concrete crack resistance curve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112082840A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101140265A (en) * | 2007-10-17 | 2008-03-12 | 南京大学 | Method for bias measuring water content of measuring and cracks using non-linearity syntony frequency |
| CN104251882A (en) * | 2014-09-30 | 2014-12-31 | 湖南理工学院 | Establishment method of concrete compression strength curve |
| CN104483330A (en) * | 2014-11-11 | 2015-04-01 | 浙江大学 | Concrete surface crack real-time monitoring system and cracking risk dynamic assessment method |
| CN106950357A (en) * | 2017-04-05 | 2017-07-14 | 国网河南省电力公司新乡供电公司 | A kind of double-admixing concrete cracking resistance appraisal procedure |
| CN110455868A (en) * | 2019-08-19 | 2019-11-15 | 昆明理工大学 | A method of concrete construction site early moist curing effect is detected using surface resistivity |
-
2020
- 2020-10-29 CN CN202011180495.2A patent/CN112082840A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101140265A (en) * | 2007-10-17 | 2008-03-12 | 南京大学 | Method for bias measuring water content of measuring and cracks using non-linearity syntony frequency |
| CN104251882A (en) * | 2014-09-30 | 2014-12-31 | 湖南理工学院 | Establishment method of concrete compression strength curve |
| CN104483330A (en) * | 2014-11-11 | 2015-04-01 | 浙江大学 | Concrete surface crack real-time monitoring system and cracking risk dynamic assessment method |
| CN106950357A (en) * | 2017-04-05 | 2017-07-14 | 国网河南省电力公司新乡供电公司 | A kind of double-admixing concrete cracking resistance appraisal procedure |
| CN110455868A (en) * | 2019-08-19 | 2019-11-15 | 昆明理工大学 | A method of concrete construction site early moist curing effect is detected using surface resistivity |
Non-Patent Citations (4)
| Title |
|---|
| 冷发光 等: ""《混凝土耐久性检验评定标准》JGJ /T 19322009简介"" * |
| 李伟: "纤维种类对水工混凝土抗裂性能的影响" * |
| 李银斌 等: "机制砂混凝土抗裂性能试验研究" * |
| 范玉玉 等: "平板法研究层布式混杂纤维混凝土早期抗裂性能" * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Manel et al. | Broad‐scale adaptive genetic variation in alpine plants is driven by temperature and precipitation | |
| Spyratos et al. | Correlation between MIB‐1 and other proliferation markers: clinical implications of the MIB‐1 cutoff value | |
| Roberts et al. | Concepts and techniques of vegetation mapping | |
| AU694144B2 (en) | Cytological screening method | |
| CN105388147A (en) | Detection method for body fluid based on special test paper | |
| CN109917402B (en) | Simulation precision determination method and system for vehicle-mounted laser radar simulation module | |
| CN109444206B (en) | Method and device for detecting quality of asphalt pavement | |
| BR112014031143B1 (en) | Method to quantify immune cells in tumor tissues and their applications | |
| MXPA04008083A (en) | Method and system for analyzing coatings undergoing exposure testing. | |
| WO2015007153A2 (en) | An immunoassay reading device and its calibration method | |
| CN107843545A (en) | A kind of design method of the high polymer material xenon lamp accelerated aging test of simulation climate environment | |
| CN112082840A (en) | Method for establishing concrete crack resistance curve | |
| Chen et al. | Validation of tissue array technology in head and neck squamous cell carcinoma | |
| Graham et al. | Tissue microarray technology in the routine assessment of HER‐2 status in invasive breast cancer: a prospective study of the use of immunohistochemistry and fluorescence in situ hybridization | |
| CN101821599A (en) | Automated cell density adjustment method for producing analysis plate | |
| CN110580505A (en) | Intelligent cash registering method based on service plate identification | |
| Borkowska et al. | EORTC risk tables–their usefulness in the assessment of recurrence and progression risk in non–muscle–invasive bladder cancer in Polish patients | |
| CN112067401B (en) | Method for determining strength maintenance age of structural entity concrete | |
| CN108734393A (en) | Matching process, user equipment, storage medium and the device of information of real estate | |
| Keiser et al. | Problems associated with homogeneity testing in climate variation studies: A case study of temperature in the northern Great Plains, USA | |
| CN111738978A (en) | Evaluation method and device for connectivity of pore throats of reservoir, electronic equipment and storage medium | |
| CN110174413A (en) | A kind of blade defect inspection method and maintaining method | |
| CN109557300A (en) | A kind of full-automatic fluoroimmunoassay system and method | |
| CN112577456B (en) | Measuring equipment point inspection method, operation control device and computer readable storage medium | |
| CN108961233A (en) | A kind of composite polycrystal-diamond surface defect classifying identification method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |